New Conditions and changing until Lemma 4.7
Merged with introduction changes
Finalizing Intro and writing abstract
Merge branch 'Intro_Abstract' into new_lema4.2
Changes proposed by FRVB  in lemma 4.5 (former 4.2) accepted.
Abstract in both pt-BR and en-US are finished
Merge branch 'Intro_Abstract' into new_lema4.2
Changes from Fernando 2014-06-21-20:35
Abstract correction with Carolina's advices
Minor correction in Abstract and Resumo
Inserting Line numbers
Inserting missing k in line 311 of alf_converg.tex
Merging corrected abstract and resumo
Minor changes on Intro and Abstract.
Merge branch 'Intro_Abstract' into new_lema4.2
Some tweaks for Line numbering
Changes in nu_k definition
Changed nu_k and omega_0. Also changed first pages of thesis
Minor corrections suggested by Fernando
sub conditions by assumtions on lemmas 4.2 and 4.4